arithmetician
Third-person singular simple present indicative form of preadmit
(now rare) One with expertise in arithmetic; a mathematician.
plural of radar reflector
1,3,5-trioxane, a stable cyclic trimer of formaldehyde.
年配の算術の専門家は、今でも私たちが使っている暗算のコツを教えてくれた。
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